Even tho you most likely won't see this, but hate to break it to you - not everyone cares about coding principles - if you can do something in one line of code and it is not very unreadable, a lot of people will do just that and most people are fine with that.
In production and development codebases for huge apps - of course its better to keep things simple and readable, but if you can condense two or three loops to just 1-2 lines, but then explain the choice in documentation - thats way better.

I agree, but I also do not know how to overcome that hunger to fit an entire JS library into one line :D

Everyone wants to boil JavaScript down to one-liners but doing that will force you to violate the DRY principle. The conversion to LC in this code should have been stored in a scoped variable so you do not have to repeat yourself and spend the extra cycles converting the string multiple times. Sometimes more is better.